摘要
起落架落震仿真是起落架研制的关键环节，全柔性体建模能更真实地复现关键承载部件在强冲击工况下的结构弹性效应。目前公开文献均以国外商业多体动力学软件为主，国产软件在该场景下的功能适用性研究尚属空白。为此，本文以英特刚柔耦合多体动力学软件V1.0为平台，研究模态中性文件（MNF）模态柔性体建模、刚柔耦合、柔柔连接、轮胎-路面接触、部件初始速度驱动等功能的实现方法并完成某型起落架落震仿真。结果表明：所建模型在首次接触时刻、力峰值时序、衰减趋势上与国外商业软件求解器一致，左右双轮对称性良好，缓冲器压缩量在两求解器上重合，验证了该软件在强非线性瞬态落震问题上的功能完整性与工程适用性。
关键词： 全柔性体；起落架；落震仿真；MNF模态柔性体；刚柔耦合；轮胎-路面接触；国产多体动力学软件
Abstract
Landing gear drop simulation is a key step in landing gear development. Full-flexible modeling more accurately reproduces the elastic effects and load distribution of key load-bearing components under strong impact. Most published studies rely on foreign commercial multibody dynamics software, and the functional applicability of domestic software in full-flexible drop simulation remains a gap. Based on Yingte Rigid-Flexible Coupled Multibody Dynamics Software V1.0, this work investigates the implementation of Modal Neutral File (MNF) modal flexible body, rigid-flexible coupling, flexible-flexible connection, tire-road contact, and initial velocity driving, and completes the drop simulation of a certain landing gear. Results agree with the foreign commercial software solver in first contact time, force peak timing, and decay trend. The dual-wheel symmetry is good and the buffer compression values coincide, verifying the functional completeness and engineering applicability of the software.
Key words： Full flexible body; Landing gear; Drop simulation; MNF modal flexible body; Rigid-flexible coupling; Tire-road contact; Domestic multibody dynamics software
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